mirror of
https://github.com/DCC-EX/CommandStation-EX.git
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367 lines
13 KiB
C++
367 lines
13 KiB
C++
/*
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© 2020, Chris Harlow. All rights reserved.
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© 2020, Harald Barth.
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This file is part of CommandStation-EX
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This is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef ARDUINO_AVR_UNO_WIFI_REV2
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// This code is NOT compiled on a unoWifiRev2 processor which uses a different architecture
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#include "WifiInterface.h" /* config.h included there */
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#include <avr/pgmspace.h>
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#include "DIAG.h"
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#include "StringFormatter.h"
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#include "WifiInboundHandler.h"
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const char FLASH READY_SEARCH[] = "\r\nready\r\n";
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const char FLASH OK_SEARCH[] = "\r\nOK\r\n";
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const char FLASH END_DETAIL_SEARCH[] = "@ 1000";
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const char FLASH SEND_OK_SEARCH[] = "\r\nSEND OK\r\n";
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const char FLASH IPD_SEARCH[] = "+IPD";
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const unsigned long LOOP_TIMEOUT = 2000;
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bool WifiInterface::connected = false;
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Stream * WifiInterface::wifiStream;
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#ifndef WIFI_CONNECT_TIMEOUT
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// Tested how long it takes to FAIL an unknown SSID on firmware 1.7.4.
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#define WIFI_CONNECT_TIMEOUT 14000
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#endif
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////////////////////////////////////////////////////////////////////////////////
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//
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// Figure out number of serial ports depending on hardware
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//
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#if defined(ARDUINO_AVR_UNO) || defined(ARDUINO_AVR_NANO)
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#define NUM_SERIAL 0
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#endif
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#if (defined(ARDUINO_AVR_MEGA) || defined(ARDUINO_AVR_MEGA2560))
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#define NUM_SERIAL 3
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#endif
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#ifndef NUM_SERIAL
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#define NUM_SERIAL 1
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#endif
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bool WifiInterface::setup(long serial_link_speed,
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const FSH *wifiESSID,
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const FSH *wifiPassword,
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const FSH *hostname,
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const int port) {
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wifiSerialState wifiUp = WIFI_NOAT;
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#if NUM_SERIAL == 0
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// no warning about unused parameters.
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(void) serial_link_speed;
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(void) wifiESSID;
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(void) wifiPassword;
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(void) hostname;
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(void) port;
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#endif
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#if NUM_SERIAL > 0
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Serial1.begin(serial_link_speed);
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wifiUp = setup(Serial1, wifiESSID, wifiPassword, hostname, port);
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#endif
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// Other serials are tried, depending on hardware.
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#if NUM_SERIAL > 1
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if (wifiUp == WIFI_NOAT)
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{
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Serial2.begin(serial_link_speed);
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wifiUp = setup(Serial2, wifiESSID, wifiPassword, hostname, port);
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}
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#endif
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#if NUM_SERIAL > 2
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if (wifiUp == WIFI_NOAT)
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{
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Serial3.begin(serial_link_speed);
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wifiUp = setup(Serial3, wifiESSID, wifiPassword, hostname, port);
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}
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#endif
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if (wifiUp == WIFI_NOAT) // here and still not AT commands found
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return false;
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DCCEXParser::setAtCommandCallback(ATCommand);
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// CAUTION... ONLY CALL THIS ONCE
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WifiInboundHandler::setup(wifiStream);
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if (wifiUp == WIFI_CONNECTED)
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connected = true;
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else
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connected = false;
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return connected;
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}
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wifiSerialState WifiInterface::setup(Stream & setupStream, const FSH* SSid, const FSH* password,
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const FSH* hostname, int port) {
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wifiSerialState wifiState;
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static uint8_t ntry = 0;
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ntry++;
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wifiStream = &setupStream;
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DIAG(F("\n++ Wifi Setup Try %d ++\n"), ntry);
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wifiState = setup2( SSid, password, hostname, port);
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if (wifiState == WIFI_NOAT) {
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DIAG(F("\n++ Wifi Setup NO AT ++\n"));
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return wifiState;
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}
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if (wifiState == WIFI_CONNECTED) {
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StringFormatter::send(wifiStream, F("ATE0\r\n")); // turn off the echo
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checkForOK(200, OK_SEARCH, true);
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}
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DIAG(F("\n++ Wifi Setup %S ++\n"), wifiState == WIFI_CONNECTED ? F("CONNECTED") : F("DISCONNECTED"));
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return wifiState;
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}
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#ifdef DONT_TOUCH_WIFI_CONF
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wunused-variable"
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#pragma GCC diagnostic ignored "-Wunused-parameter"
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#endif
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wifiSerialState WifiInterface::setup2(const FSH* SSid, const FSH* password,
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const FSH* hostname, int port) {
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bool ipOK = false;
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bool oldCmd = false;
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char macAddress[17]; // mac address extraction
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// First check... Restarting the Arduino does not restart the ES.
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// There may alrerady be a connection with data in the pipeline.
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// If there is, just shortcut the setup and continue to read the data as normal.
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if (checkForOK(200,IPD_SEARCH, true)) {
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DIAG(F("\nPreconfigured Wifi already running with data waiting\n"));
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// loopstate=4; // carry on from correct place... or not as the case may be
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return WIFI_CONNECTED;
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}
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StringFormatter::send(wifiStream, F("AT\r\n")); // Is something here that understands AT?
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if(!checkForOK(200, OK_SEARCH, true))
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return WIFI_NOAT; // No AT compatible WiFi module here
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StringFormatter::send(wifiStream, F("ATE1\r\n")); // Turn on the echo, se we can see what's happening
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checkForOK(2000, OK_SEARCH, true); // Makes this visible on the console
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// Display the AT version information
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StringFormatter::send(wifiStream, F("AT+GMR\r\n"));
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checkForOK(2000, OK_SEARCH, true, false); // Makes this visible on the console
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#ifdef DONT_TOUCH_WIFI_CONF
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DIAG(F("\nDONT_TOUCH_WIFI_CONF was set: Using existing config\n"));
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#else
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StringFormatter::send(wifiStream, F("AT+CWMODE=1\r\n")); // configure as "station" = WiFi client
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checkForOK(1000, OK_SEARCH, true); // Not always OK, sometimes "no change"
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// Older ES versions have AT+CWJAP, newer ones have AT+CWJAP_CUR and AT+CWHOSTNAME
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StringFormatter::send(wifiStream, F("AT+CWJAP?\r\n"));
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if (checkForOK(2000, OK_SEARCH, true)) {
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oldCmd=true;
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while (wifiStream->available()) StringFormatter::printEscape( wifiStream->read()); /// THIS IS A DIAG IN DISGUISE
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}
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const char *yourNetwork = "Your network ";
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if (strncmp_P(yourNetwork, (const char*)SSid, 13) == 0 || strncmp_P("", (const char*)SSid, 13) == 0) {
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if (strncmp_P(yourNetwork, (const char*)password, 13) == 0) {
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// If the source code looks unconfigured, check if the
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// ESP8266 is preconfigured in station mode.
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// We check the first 13 chars of the SSid and the password
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// give a preconfigured ES8266 a chance to connect to a router
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// typical connect time approx 7 seconds
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delay(8000);
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StringFormatter::send(wifiStream, F("AT+CIFSR\r\n"));
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if (checkForOK(5000, (const char*) F("+CIFSR:STAIP"), true,false))
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if (!checkForOK(1000, (const char*) F("0.0.0.0"), true,false))
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ipOK = true;
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}
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} else {
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// SSID was configured, so we assume station (client) mode.
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if (oldCmd) {
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// AT command early version supports CWJAP/CWSAP
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StringFormatter::send(wifiStream, F("AT+CWJAP=\"%S\",\"%S\"\r\n"), SSid, password);
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ipOK = checkForOK(WIFI_CONNECT_TIMEOUT, OK_SEARCH, true);
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} else {
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// later version supports CWJAP_CUR
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StringFormatter::send(wifiStream, F("AT+CWHOSTNAME=\"%S\"\r\n"), hostname); // Set Host name for Wifi Client
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checkForOK(2000, OK_SEARCH, true); // dont care if not supported
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StringFormatter::send(wifiStream, F("AT+CWJAP_CUR=\"%S\",\"%S\"\r\n"), SSid, password);
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ipOK = checkForOK(WIFI_CONNECT_TIMEOUT, OK_SEARCH, true);
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}
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if (ipOK) {
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// But we really only have the ESSID and password correct
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// Let's check for IP (via DHCP)
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ipOK = false;
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StringFormatter::send(wifiStream, F("AT+CIFSR\r\n"));
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if (checkForOK(5000, (const char*) F("+CIFSR:STAIP"), true,false))
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if (!checkForOK(1000, (const char*) F("0.0.0.0"), true,false))
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ipOK = true;
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}
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}
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if (!ipOK) {
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// If we have not managed to get this going in station mode, go for AP mode
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// StringFormatter::send(wifiStream, F("AT+RST\r\n"));
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// checkForOK(1000, OK_SEARCH, true); // Not always OK, sometimes "no change"
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int i=0;
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do {
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// configure as AccessPoint. Try really hard as this is the
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// last way out to get any Wifi connectivity.
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StringFormatter::send(wifiStream, F("AT+CWMODE=2\r\n"));
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} while (!checkForOK(1000+i*500, OK_SEARCH, true) && i++<10);
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while (wifiStream->available()) StringFormatter::printEscape( wifiStream->read()); /// THIS IS A DIAG IN DISGUISE
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// Figure out MAC addr
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StringFormatter::send(wifiStream, F("AT+CIFSR\r\n")); // not TOMATO
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// looking fpr mac addr eg +CIFSR:APMAC,"be:dd:c2:5c:6b:b7"
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if (checkForOK(5000, (const char*) F("+CIFSR:APMAC,\""), true,false)) {
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// Copy 17 byte mac address
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for (int i=0; i<17;i++) {
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while(!wifiStream->available());
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macAddress[i]=wifiStream->read();
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StringFormatter::printEscape(macAddress[i]);
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}
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} else {
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memset(macAddress,'f',sizeof(macAddress));
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}
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char macTail[]={macAddress[9],macAddress[10],macAddress[12],macAddress[13],macAddress[15],macAddress[16],'\0'};
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while (wifiStream->available()) StringFormatter::printEscape( wifiStream->read()); /// THIS IS A DIAG IN DISGUISE
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i=0;
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do {
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if (strncmp_P(yourNetwork, (const char*)password, 13) == 0) {
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// unconfigured
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StringFormatter::send(wifiStream, F("AT+CWSAP%s=\"DCCEX_%s\",\"PASS_%s\",1,4\r\n"), oldCmd ? "" : "_CUR", macTail, macTail);
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} else {
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// password configured by user
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StringFormatter::send(wifiStream, F("AT+CWSAP%s=\"DCCEX_%s\",\"%S\",1,4\r\n"), oldCmd ? "" : "_CUR", macTail, password);
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}
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} while (!checkForOK(WIFI_CONNECT_TIMEOUT, OK_SEARCH, true) && i++<2); // do twice if necessary but ignore failure as AP mode may still be ok
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if (i >= 2)
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DIAG(F("\nWarning: Setting AP SSID and password failed\n")); // but issue warning
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if (!oldCmd) {
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StringFormatter::send(wifiStream, F("AT+CIPRECVMODE=0\r\n"), port); // make sure transfer mode is correct
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checkForOK(2000, OK_SEARCH, true);
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}
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}
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StringFormatter::send(wifiStream, F("AT+CIPSERVER=0\r\n")); // turn off tcp server (to clean connections before CIPMUX=1)
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checkForOK(1000, OK_SEARCH, true); // ignore result in case it already was off
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StringFormatter::send(wifiStream, F("AT+CIPMUX=1\r\n")); // configure for multiple connections
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if (!checkForOK(1000, OK_SEARCH, true)) return WIFI_DISCONNECTED;
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StringFormatter::send(wifiStream, F("AT+CIPSERVER=1,%d\r\n"), port); // turn on server on port
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if (!checkForOK(1000, OK_SEARCH, true)) return WIFI_DISCONNECTED;
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#endif //DONT_TOUCH_WIFI_CONF
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StringFormatter::send(wifiStream, F("AT+CIFSR\r\n")); // Display ip addresses to the DIAG
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if (!checkForOK(1000, (const char *)F("IP,\"") , true, false)) return WIFI_DISCONNECTED;
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// Copy the IP address
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{
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const byte MAX_IP_LENGTH=15;
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char ipString[MAX_IP_LENGTH+1];
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ipString[MAX_IP_LENGTH]='\0'; // protection against missing " character on end.
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for(byte ipLen=0;ipLen<MAX_IP_LENGTH;ipLen++) {
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while(!wifiStream->available());
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int ipChar=wifiStream->read();
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StringFormatter::printEscape(ipChar);
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if (ipChar=='"') {
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ipString[ipLen]='\0';
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break;
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}
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ipString[ipLen]=ipChar;
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}
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LCD(4,F("%s"),ipString); // There is not enough room on some LCDs to put a title to this
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}
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// suck up anything after the IP.
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if (!checkForOK(1000, OK_SEARCH, true, false)) return WIFI_DISCONNECTED;
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LCD(5,F("PORT=%d\n"),port);
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return WIFI_CONNECTED;
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}
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#ifdef DONT_TOUCH_WIFI_CONF
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#pragma GCC diagnostic pop
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#endif
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// This function is used to allow users to enter <+ commands> through the DCCEXParser
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// Once the user has made whatever changes to the AT commands, a <+X> command can be used
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// to force on the connectd flag so that the loop will start picking up wifi traffic.
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// If the settings are corrupted <+RST> will clear this and then you must restart the arduino.
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void WifiInterface::ATCommand(const byte * command) {
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command++;
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if (*command=='X') {
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connected = true;
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DIAG(F("\n++++++ Wifi Connction forced on ++++++++\n"));
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}
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else {
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StringFormatter:: send(wifiStream, F("AT+%s\r\n"), command);
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checkForOK(10000, OK_SEARCH, true);
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}
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}
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bool WifiInterface::checkForOK( const unsigned int timeout, const char * waitfor, bool echo, bool escapeEcho) {
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unsigned long startTime = millis();
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char const *locator = waitfor;
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DIAG(F("\nWifi Check: [%E]"), waitfor);
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while ( millis() - startTime < timeout) {
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while (wifiStream->available()) {
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int ch = wifiStream->read();
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if (echo) {
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if (escapeEcho) StringFormatter::printEscape( ch); /// THIS IS A DIAG IN DISGUISE
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else DIAG(F("%c"), ch);
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}
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if (ch != GETFLASH(locator)) locator = waitfor;
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if (ch == GETFLASH(locator)) {
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locator++;
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if (!GETFLASH(locator)) {
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DIAG(F("\nFound in %dms"), millis() - startTime);
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return true;
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}
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}
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}
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}
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DIAG(F("\nTIMEOUT after %dms\n"), timeout);
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return false;
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}
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void WifiInterface::loop() {
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if (connected) {
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WifiInboundHandler::loop();
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}
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}
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#endif
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